The 4.0 version of MultiCharts allows creating a custom optimization criterion in addition to the existing ones. This custom-created critereon will be used for optimization runs on the chart where it was created.

When you go to Optimize, specify input values and then go to the tab called 'Optimiaztion Criteria'. Check 'Use Limitation' and then go to 'Custom Criteria'.

In 'Custom Criteria' you need to write the formula that will be used for this particular parameter. It has to be expressed through the reserved words (you will find the samples and the list of the reserved words listed there.